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Income Taxes - Reconciliation of Income tax expense (benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Income Taxes |  |
Computed "expected" tax expense (benefit) (in Dollars) | $ 240 | $ (225)
Computed "expected" tax expense (benefit) | 21.00% | 21.20%
Increases (reductions) in taxes resulting from: |  |
State income taxes, net of federal tax benefit (in Dollars) | $ (38) | $ (7)
State income taxes, net of federal tax benefit | (3.30%) | 0.70%
Foreign rate differential (in Dollars) | $ 13 | $ 2
Foreign rate differential | 1.10% | (0.20%)
Exclusion of PPP Loan Forgiveness Income (in Dollars) | $ (458) |
Exclusion of PPP Loan Forgiveness Income | (40.10%) |
Exclusion of the UK's Gain on Sale of Disc Ops Entity (in Dollars | $ (98) |
Exclusion of the UK's Gain on Sale of Disc Ops Entity | (8.60%) |
Permanent differences (in Dollars) | $ (22) | $ (3)
Permanent differences | (1.90%) | 0.30%
Change in valuation allowance (in Dollars) | $ 1,598 | $ 1,005
Change in valuation allowance | 139.80% | (94.70%)
Research and development credit (in Dollars) | $ (116) | $ (107)
Research & development credit | (10.10%) | 10.10%
Benefit of US Federal NOL carryback (in Dollars) | $ (359) | $ (222)
Benefit of US Federal NOL carryback | (31.40%) | 20.90%
Return to Provision Adjustments (in Dollars) | $ (394) |
Return to Provision Adjustments | (34.50%) |
Other items (in Dollars) | $ 78 | $ (59)
Other items | 6.80% | 5.50%
Income tax (benefit) expense (in Dollars) | $ 444 | $ 384
Income tax (benefit) expense | 38.80% | (36.20%)

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